Machine for grinding rotary disk cutters



(No Mode1.)' 2 Sheets-Sheet 1. J. L. MORRISON 8D A. D. ROWE.

MACHINE FOR GRINDING ROTARY DISK UUTTERS.

No. 398,741. Patented Pb. 26, 1889.

N. PETERS. Plmlo-Lkhognphor. Waihinglnn. D. c.

(No Model.) 2 Sheets-Sheet J. L. MORRISON & A. D. ROWE.

MACHINE FOR GRINDING ROTARY DISK OUTTERS.

N0.'398,741. Patented Feb. 26, 1889.

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UniTn b TnTns JOHN L. )[ORRlSUN AND AMOS l). .I UHYE, ()F llUI/l'tllilfi,

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MACHINE FOR GRlNDiNG ROTARY DISK CUTTERS.

SPECIFICATION forming part of Letters Patent No. 398,741, dated February 26, 1889.

Application filed September 13, 1888. Serial No. 285,314 (No model.)

.TO a-ZL who/1t it may (JUNUL'IIL:

Be it known that we, JOHN L. MORRISON and AMOS D. ROWE, citizens of the United States, residing at liolyoke, in the county of I-Iampden and State of Massachusetts, have invented new and useful Improvements in Machines for Grinding Rotary Disk Cutters, of which the following is a specification.

This invention relates to mach incs for gri nding and rabbeting with a shallow channel the side of a disk-shaped rotary cutter at and within its edge for sharpening the same,said cutters in use being arranged in pairs, with their faces slightly overlapping for a shearing action, and as commonly employed-and known as web-slitters in paper-machines; and the invention consists in the construction and combination of parts whereby cutters of the class named may be mounted and rotated, and whereby the rotary grindingwheel may be properly presented for the desired action against the face of the cutter, and all substantially as will hereinafter more fully appear, and be set forth in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a front elevation of the machine. Fig. 2 is a plan view thereof, andFig. 3 is an end elevation of the same. Fig. eis a view in detail illustrating in section one form of cutter of the class described and the means for securing its true mounting and centering 011 the holder-shaft; and Fig. 5 is a side elevation, partly in section, of a cutter of different form from the one shown in Fi 4, its cut tingedge, however, being the same.

In the drawings, A represents the supporting-table of the machine afiixed to and supported upon the frame B, and C represents the driving-shaft extendin from front to rear of the machine, being supported in bearings 10 of the iframe.

On an intermediate portion of the driving shaft is fixed a worm-screw, 12, with which engages a worm-wheel, 13,which is supported on a counter-shaft, 14, mounted in brackets 15, and extending at right angles to the driving-shaft, and on the outer end of which is fixed a pulley, 16, and mounted in bearings 19, supported above the table, is another shaft, 2o, receiving rotation by the belt 21, passing between and aroundits pullcyi. and the said pulley 1c. ilhedisk-sha ied cutter l) is to be centered and held on the said shaft it) for rotation therewith.

On the table, near the l'ront thereof, sccured in any suitable manner, but preterabl y adjustable thereon, is a longitudinal slideplate, 24, on which is a sliding carriage, 25, and on the said carriage acarriage, g, arranged for a transverse movement thereon. In the bearings 17 of the latter carriage g is a shaft, 18, in or about in the same horizontal. plane as the cutter-holder shaft 20, on the inner end of which is at'iixed the grindingwheel 27, a pulley, 23, being provided on its outer end, and through the belt-connection 29 between said pulley '28 and the pulley 30 011 the drivingshatt said grinding-wheel is speeded.

At the rear side of the machine-frame, on a horizontal rocker-rod, 32, is fixed intermediately of its length a tilting lever, 33, a connecting-rod, 3i, being hung by one end to the upper end of the said tilting lever, and by its other end connected to the rear edge of the grinder-supporting carriage, and to the lower end of the tilting lever is connected one end of a connecting-rod, 35, which by its other end embraces an eccentric, 36, on the countershaft.

The grintier-carriage g is by its one side, which is at right angles to that at which the connecting-rod is attached, connected by links 37 to the longitudinally-slidin g carriage 25, whereby the transverse movement imparted to the said carriage and to the grinderwheel by the connections from the eccentric described is a curvilinear reciprocating motion and one corresponding to the transverse contour of the channel (1 in the face of the grinder-disk. Lugs 38 on the carriage 25, overlying the top of the grinding-carriage 9,0011- strain the movements of the latter in a horizontal plane, asuitable space being allowed between the edges of the grinder-carriage and the inner walls of the lugs to permitfree play of the grindencarriage in its curvilinear re ciprocating traverse.

A11 unthreaded portion of a screw-shaft, do, has a bearing for rotation in a lug, d2, of the longitudinal slideway or plate 24:, being held against lengthwise movement therein by the collars or shoulders i3 43, and the screwthreaded portion of said shaft 40 engages a tapped lug, 44:, on the longitudinally-sliding carriage 25, and a ratchet-wheel, 46, is fixed on the outer end of said screw-shaft 4:0, with which a pallet-rod, 47, engages, said palletrod being by its outer end piy'otally hung on a radial arm, 48, fixed to and moving with the rocker-rod 32, a spring, 4.), suitably applied, serving to maintain the end of the pallet-rod in engagement with the ratchetwheel.

lVith the cutter-disk D mounted on the holder-shaft 20, and the carriages adjusted so as to have the edge of the grindingavheel presented against the face of the cutter-disk near its edge, as seen in Figs. 2 and 3, under the driving of the parts described from the main shaft, the edge of the rotating grinder wheel is made to traverse in a curvilinear course across the face of the cutter-disk to form the curved channel required, and through the rotation of the screw-shaft from the connections described or otherwise the carriage 25 is moved longitudinally, so as to advance the grinder-wheel for a constant presentation, as the face of the grinder is threaded end below the table a thumb setnut, 54.

Many of the disk cutters are formed, as shown in Fig. 4, with a hollow hub, (10, extend.- ing from each face thereof, and in the said Fig. at, as also in the prccedin g figures, devices for mounting and centering this form of cutter are shown, and consist in providing at a suitable distance from the end of the holdershaft 20 a fixed conical collar or shoulder, 62, and at its outer end a screw-threaded portion, 03, on which a removable collar or shoulder, (ll, similar to the one 62, may be fixed and adjusted. The one open end of the hub is forced on and over the end of the inner conical shoulder, the outer shoulder-collar being of course removed, after which said collar is screwed on the end of the shaft and by its tapering face brought to a bearing within and against the opposing open end of the said hub 60, bringing the cutter-disk true and concentric on the holder-shaft. Other devices may of course be employed for centering the cutter-disks on the holder-shaf t than those shown.

After the cutter-disk has been sufficiently and automatically ground by the mechanism,

and in the manner substantially as described, by disengaging the pallet-rod from the ratchet-wheel and through the crank-handle 66 thereof turning the said ratchet-wheel in the opposite direction from that imparted thereto, as before described, through said screw-rod engagement, the carriages may be withdrawn into what would be their required position at the beginning of the operation to grind another cut-ter. Again, if desired, instead of feeding the carriages forward in a direction against the face of the cutter to be ground automatically, as described, the carriage may be forced in said direction directly by an operative, the screw feed connection being omitted; or, again, by turning the feed-screw through the crank-handle, the carriages may be properly moved.

hat we claim as our invention is 1. In a machine for grinding rotary cutterdisks, substantially as described, the combination, with a rotary holder-shaft on which to center the disk, of a carriage having mounted thereon a rotary grinding-wheel adjusted for a bearing by its edge against the face of said cutter-disk, and said carriage and grinding-wheel having a reciprocating traverse oblique to the plane of the disk-face, substantially as described.

2. In a machine for grinding rotary cutterdisks, substantially as described, the combination, with a rotary holder-shaft on which to center the disk, of a carriage having mounted thereon a rotary grinding-wheel adjusted for a bearing by its edge against the face of said cutter-disk, and said carriage and grinding-wheel having a reciprocating traverse oblique to the plane of the disk-face, and also mounted for a slide in the direction of the axis of said holder-shaft, substantially as described. 7

23. The combination, with the rotary holdershaft on which to center a cutter l'isk, of a longitudinally sliding carriage, 25, having thereon the traverse grinding carriage g, linked at one end to the said carriage 25, and carrying the rotary grindingwheel, a tilting lever, 33, and a connecting-rod between said lever and said grindingcarriage, substantially as and for the purpose described.

l. The combination, with the rotary holdershaft 011 which to center a cutter-disk, of a longitudinal slideway, 2%, a carriage, 25, adapted to slide on said way, the grindingcarriage mounted for a transverse slide on said carriage 25, and by one end linked thereto, a tilting lever, 33, and a connecting-rod between said lever and said grinding-carriage, and a screw-shaft having a screw engagement with said carriage 25, and a fixed bearing for free rotation on the slidewayQ, and provided with a crank handle, substantially as described.

5. The combination, with the rotary holdershaft on which to center a cutter-disk, of a longitudinal slideway, 524, a carriage, 25,

47, connected by one end to the said lever 48 and engaging by its other end the said ratchet- Wheel, substantially as and for the purpose described.

6. The combination, with the carriage 25 and the grimling-carriage constrained for a curvilinear traverse thereon, snbstantiallyas described, of the eccentric 36 and rocker-shaft 32, the lever intermediately fixed on said rocker-shaft, the connecting-rod 34, connected to the said grindii'lg-carriag'e and to the upper end of said lever 33, and the connecting-rod 35, by one end engaging said eccentric and by its other connected to the lower end of said lever 33, all substantially as and for the pur- 25 pose described.

JOHN L. MORRISON. A. D. ROlVE.

Witnesses:

G. M. CHAMBERLAIN, H. A. CHAPIN. 

